diff --git a/app/stylesheets/shell-window/chrome-tabs.less b/app/stylesheets/shell-window/chrome-tabs.less
index fd893a404d..d661168f09 100644
--- a/app/stylesheets/shell-window/chrome-tabs.less
+++ b/app/stylesheets/shell-window/chrome-tabs.less
@@ -2,6 +2,7 @@
   position: relative;
   padding: 0 18px 0 10px;
   height: 35px;
+  border-bottom: 1px solid #c5c5c5;
 }
 
 .chrome-tabs {
@@ -22,6 +23,7 @@
     z-index: 1;
     -webkit-app-region: no-drag;
     transition: .1s transform;
+    border-left: 1px solid #c5c5c5;
 
     .chrome-tab-favicon {
       height: 16px;
@@ -104,7 +106,6 @@
     &.chrome-tab-current {
       z-index: 999;
       background-color: #f5f5f5;
-      height: 36px; // bleed over the border
     }
 
     &.chrome-tab-add-btn {
diff --git a/app/stylesheets/shell-window/toolbar-actions.less b/app/stylesheets/shell-window/toolbar-actions.less
index 13efd66f34..2a4ddfe257 100644
--- a/app/stylesheets/shell-window/toolbar-actions.less
+++ b/app/stylesheets/shell-window/toolbar-actions.less
@@ -3,6 +3,7 @@
   padding: 5px 4px 4px 2px;
   margin: 0;
   background: #f5f5f5;
+  border-bottom: 1px solid #c5c5c5;
 
   &.hidden {
     display: none;